Replace value with canonical in PersonIdentifier unique constraint, repository logic, and tests

- Update unique constraint on `PersonIdentifier` to use `canonical` instead of `value`.
- Refactor repository method `findByDefinitionAndValue` to `findByDefinitionAndCanonical`, updating logic accordingly.
- Adjust validation logic in `UniqueIdentifierConstraintValidator` to align with the new canonical-based approach.
- Modify related integration and unit tests to support the changes.
- Inject `PersonIdentifierManagerInterface` into the repository to handle canonical value generation.

src/Bundle/ChillPersonBundle/PersonIdentifier/Identifier/StringIdentifier.php

@@ -19,9 +19,11 @@ use Symfony\Component\Form\FormBuilderInterface;
 
 final readonly class StringIdentifier implements PersonIdentifierEngineInterface
 {
+    public const NAME = 'chill-person-bundle.string-identifier';
+
     public static function getName(): string
     {
-        return 'chill-person-bundle.string-identifier';
+        return self::NAME;
     }
 
     public function canonicalizeValue(array $value, PersonIdentifierDefinition $definition): ?string